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It’s simple to extract music from videos. You don’t have to download any additional software to do it if your computer already has VLC Media Player installed. The convert feature that comes with the free player allows you to remove the video part and just keep the audio or the music. That means you can remove all those moving images and just save it as an MP3 or any other audio format like WAV, FLAC or OGG. This is a great feature if you want to just keep the music from the music videos. You’d be reducing the file size drastically. Click on Media > Convert/Save [CTRL + R]. Click on Add. Browse and open your video file. Click on Convert/Save. Under Settings, in Profile choose Audio – MP3. Hit Browse and give a destination file name with the extension ending in .mp3. Click Start. Source: VLCHelp

MP4 MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. TS TS stands for Transport Stream TS files are specified for MPEG-2 part 1 systems MPEG transport stream (transport stream, MPEG-TS, MTS or TS) is a standard digital container format for transmission and storage of audio, video, and Program and System Information Protocol (PSIP) data.[3] It is used in broadcast systems such as DVB, ATSC and IPTV. The video quality of MP4 and TS files are the same. The primary difference between TS and MP4 files is that TS files are flat while MP4 files have an index at the beginning of the MP4 file. Otherwise, the video bits inside the files are the same and therefore the video quality of TS, M2TS and MP4 files are the same. Sources: wikipedia_mp4 wikipedia_ts digitalfaq ...

To add audio with .ts video file and convert into mp4 you can use FFmpeg. Check below link for installation steps of FFmpeg: How to setup, install, configure, use ffmpeg on Windows 10 Follow below steps to achieve above target: Open CMD and set the path where your audio and ts video files are placed: Now use below command to add audio to ts file and convert into mp4. ffmpeg -i audio_file_name.audio_ext -i video_file_name.video_ext -async 1 -c copy output_video_name.encoding_extension ffmpeg -i 01_audio.aac -i 01.ts -async 1 -c copy 01.mp4 I have done this because my download manager didn't able to download audio in TS file, I got audio and TS file separately. If you have video data only in TS files, and audio data only in another TS files. You can use tsMuxer to add the audio stream from one .ts file into the .ts file containing the video or vice versa. This is called muxing and doesn't affect the quality of the audio or video in any way. ...